What you put in, you'll get back ten fold
Having problems logging in? Please clear your cache and remove the MazdaMenders related cookie from your browser.
If you need assistance doing this, don't hesitate to contact us on FaceBook or email forum-admin@mazdamenders.net stating the browser you use.

Regards
Admin

Head work, Skim and simple porting.

User avatar
nedski
Serial Poster
Posts: 732
Joined: Fri Jun 01, 2012 11:17 pm
Location: North Kelsey, Market Rasen
Contact:

Head work, Skim and simple porting.

Postby nedski » Sun Jan 19, 2014 1:55 am

I have two Mk1 1.8's that i've been volunteered to get more power from.
Both are getting some head work. This will be my first mx5 head attempt although I've done others.
I'll give a quick list of what we are planning on doing.

1, Georges Orange track car. 1.8 mk1

40 thou head skim. Simple porting to match up inlet and exhaust manifolds. removal of casting marks and anything obvious that might limit flow.
Exhaust intake cam swap ( run 2 exhaust cams)
Skuzzle chipped ECU
De cat
Cold Air intake
K&N Pannel filter inside standard air filter box.
14-16 deg timing mod

2, Brothers green road/track 1.8 mk1

Same again for the head, 40 thou head skim. Simple porting to match inlet and exhaust manifolds to the head. Removal of casting marks and anything obvious that might limit flow.
Swap Time. This one has two exhaust cams and the Skuzzle ECU (kindly getting donated into georges orange car). The two cams from the orange car are getting a blink motorsport Piper cam re-grind and are going into this one.
This car is also getting a Blink Megasquirt setup for the Piper Cams (rolling road to follow)

So i'll keep posting photo's as we go along over the next month or so. Get you :coffee: and i'll keep it simple and mostly picture based.
Orange car first and also the first one in my new garage at home. It's only taken a year and a half to build.

Image

Image

Here we go it's easy to take things appart.
Image

Radiator out First and Air con in the bin.
Image

Rads out and aircon is off.
Image

Alternator belt, plug leads, coil pack, daft air horns off.
Image

Injectors, inlet manifold off.
Image

Image

Timing marks
Image
Image

Ok some people don't do this but needs must. Need the bottom pulley off to replace the oil seal, if your doing a cam belt this doesn't need to come undone. Anyway quick way to crack the big crank bolt if you don't have a locking tool to hand. As you can see rest a breaker bar on the passenger chassis leg and give the starter a quick flick. Mostly this works but it's not an ideal way to do it.
Image

Scratched a line in the CAS so it can easily be fitted back to the same place. Although the timing will be set with a timing light.
Image

Cams are out
Image

And hurray the heads off. Lucky i had a cheap socket set at home for the splined cylinder head bolts.
Image

there is a fair bit of blowby past the cylinders by the looks. The cleaner area of piston top is where gasses blow past the rings and clean that area.
Image

Image

No fancy tools so far just sockets pliers and spanners at home.
Image

My 16 year old did most of the work while i watched on drinking tea. :handgestures-thumbup:
More to follow soon.
Mk1 1.6 Turbo. Gaz shocks. Tr Lane roll bar.
Garage Owner, Lincolshire
Helper to the Scunny track day crew and North Linc's Track Day Club.
www.stokesofkelsey.co.uk
User avatar
flea
Site Admin
Posts: 6616
Joined: Wed Dec 07, 2011 8:42 pm
Location: Medway towns, Kent

Re: Head work, Skim and simple porting.

Postby flea » Sun Jan 19, 2014 10:05 am

:handgestures-thumbup:
Eunos 1.6 special 1989 with a few added extras
Eunos 1991 1.6
Eunos 1990 1.6 project
Mk2 1999 1.8
User avatar
Mazda Mender
Site Admin
Posts: 12749
Joined: Tue Dec 06, 2011 6:18 pm
Location: Pie land,North west
Contact:

Re: Head work, Skim and simple porting.

Postby Mazda Mender » Sun Jan 19, 2014 10:24 am

:text-goodpost: :text-coolphotos: :clap: :bow-yellow:
M-m
The Disclaimer:-
This post is a natural product made from recycled electrons. The slight variations in spelling and grammar enhance its individual character and beauty and in no way are to be considered flaws or defects, the articles/answers/comments are provided for information purposes and they are not intended to substitute informed professional advice, I or mazdamenders.net cannot personally be hold responsible for any damage occurred from following this procedure or any injuries from it. Proceed at your own risk.


Mk 1 Eunos 93 black V.S II 1.8 ,
Mk 2 .1/4 Roadster 99 black & gold V.S 1.8 being rebuilt,
Mk 1 Eunos 90 1.6 (claimed by daughter)
MK 2.1/4 Blue V.S Roadster 1.8 99 ...being rebuilt

http://www.mx5oc.co.uk/ http://www.mx5nutz.com/forum/ http://miata.net/ http://www.autolinkuk.co.uk/
User avatar
Yolo
Epic Poster
Posts: 1095
Joined: Sun Mar 17, 2013 10:39 pm
Location: Co.Antrim

Re: Head work, Skim and simple porting.

Postby Yolo » Sun Jan 19, 2014 2:10 pm

love the garage, my wife says it's not a garage it's a house with a car in it.
no special tools but lots of knowledge..... 16 yr old putting me to shame.... :clap:
Nice job!
I am off to the garage...... :roll:
Mk 1 Eunos 1.6 Silver
Mk2 Suspension - Mk2.5 leather seats - IL Motorsport Bushes - 1.8 brake upgrade
Getting there slowly
viewtopic.php?f=35&t=4699
User avatar
flea
Site Admin
Posts: 6616
Joined: Wed Dec 07, 2011 8:42 pm
Location: Medway towns, Kent

Re: Head work, Skim and simple porting.

Postby flea » Sun Jan 19, 2014 5:17 pm

Yolo wrote:love the garage, my wife says it's not a garage it's a house with a car in it.
no special tools but lots of knowledge..... 16 yr old putting me to shame.... :clap:
Nice job!
I am off to the garage...... :roll:


Love it. Where's the kettle?
Eunos 1.6 special 1989 with a few added extras
Eunos 1991 1.6
Eunos 1990 1.6 project
Mk2 1999 1.8
User avatar
Mazda Mender
Site Admin
Posts: 12749
Joined: Tue Dec 06, 2011 6:18 pm
Location: Pie land,North west
Contact:

Re: Head work, Skim and simple porting.

Postby Mazda Mender » Sun Jan 19, 2014 9:59 pm

Nooooo ,no brewing tackle, downer.
M-m
The Disclaimer:-
This post is a natural product made from recycled electrons. The slight variations in spelling and grammar enhance its individual character and beauty and in no way are to be considered flaws or defects, the articles/answers/comments are provided for information purposes and they are not intended to substitute informed professional advice, I or mazdamenders.net cannot personally be hold responsible for any damage occurred from following this procedure or any injuries from it. Proceed at your own risk.


Mk 1 Eunos 93 black V.S II 1.8 ,
Mk 2 .1/4 Roadster 99 black & gold V.S 1.8 being rebuilt,
Mk 1 Eunos 90 1.6 (claimed by daughter)
MK 2.1/4 Blue V.S Roadster 1.8 99 ...being rebuilt

http://www.mx5oc.co.uk/ http://www.mx5nutz.com/forum/ http://miata.net/ http://www.autolinkuk.co.uk/
User avatar
nedski
Serial Poster
Posts: 732
Joined: Fri Jun 01, 2012 11:17 pm
Location: North Kelsey, Market Rasen
Contact:

Re: Head work, Skim and simple porting.

Postby nedski » Sun Jan 19, 2014 10:14 pm

Sunday and my Brothers car dropped off for his head work. No rest is there !

Head off again.
Image

Image

Image

This photo has the head George just removed on the left and a spare head with a 40 thou skim ready for porting on the right.
Image

intersting photo's These show the rough cast of the ports. Amazing how rough they are and all the sand it was cast with can be seen, very gritty. Also the rough casting joint. None of this is good for air flow so says simple common sense :-D
Image

Same thing ports with sides as rough as hell. Also a huge lip just under the valve seat. I think a profesional may fill that ridge under the seat. But i'm not confident to fill inside a port. I wouldn't wan't it to come loose and be eaten by the engine.
Image

this photo shows How the Cylinder head port is smaller than the exhaust. In fact the screw driver points to how the head is smaller than the gasket. The black ring is actually how much bigger the exhaust is still.
Image

And the heads lined up ready for working on.
Image

Enough for today.
Image

And yeh I rely on the mrs for brews :coffee:
Mk1 1.6 Turbo. Gaz shocks. Tr Lane roll bar.
Garage Owner, Lincolshire
Helper to the Scunny track day crew and North Linc's Track Day Club.
www.stokesofkelsey.co.uk
User avatar
Mazda Mender
Site Admin
Posts: 12749
Joined: Tue Dec 06, 2011 6:18 pm
Location: Pie land,North west
Contact:

Re: Head work, Skim and simple porting.

Postby Mazda Mender » Mon Jan 20, 2014 12:38 am

:bow-yellow: :text-coolphotos: :text-goodpost: :handgestures-thumbup: :coffee:
M-m
The Disclaimer:-
This post is a natural product made from recycled electrons. The slight variations in spelling and grammar enhance its individual character and beauty and in no way are to be considered flaws or defects, the articles/answers/comments are provided for information purposes and they are not intended to substitute informed professional advice, I or mazdamenders.net cannot personally be hold responsible for any damage occurred from following this procedure or any injuries from it. Proceed at your own risk.


Mk 1 Eunos 93 black V.S II 1.8 ,
Mk 2 .1/4 Roadster 99 black & gold V.S 1.8 being rebuilt,
Mk 1 Eunos 90 1.6 (claimed by daughter)
MK 2.1/4 Blue V.S Roadster 1.8 99 ...being rebuilt

http://www.mx5oc.co.uk/ http://www.mx5nutz.com/forum/ http://miata.net/ http://www.autolinkuk.co.uk/
User avatar
nedski
Serial Poster
Posts: 732
Joined: Fri Jun 01, 2012 11:17 pm
Location: North Kelsey, Market Rasen
Contact:

Re: Head work, Skim and simple porting.

Postby nedski » Tue Jan 21, 2014 12:19 am

Had a go tonight. 2 heads= 32 ports.
one down :handgestures-thumbup:

Before and after. If that doesn't flow better i'll eat my socks !
Image

1st one. Also took a little off the valve guide.
Image

And engineers blue used to match up the ports.
Image
Mk1 1.6 Turbo. Gaz shocks. Tr Lane roll bar.
Garage Owner, Lincolshire
Helper to the Scunny track day crew and North Linc's Track Day Club.
www.stokesofkelsey.co.uk
User avatar
Yolo
Epic Poster
Posts: 1095
Joined: Sun Mar 17, 2013 10:39 pm
Location: Co.Antrim

Re: Head work, Skim and simple porting.

Postby Yolo » Tue Jan 21, 2014 9:17 am

Outstanding..... :clap:
Mk 1 Eunos 1.6 Silver
Mk2 Suspension - Mk2.5 leather seats - IL Motorsport Bushes - 1.8 brake upgrade
Getting there slowly
viewtopic.php?f=35&t=4699
User avatar
flea
Site Admin
Posts: 6616
Joined: Wed Dec 07, 2011 8:42 pm
Location: Medway towns, Kent

Re: Head work, Skim and simple porting.

Postby flea » Tue Jan 21, 2014 9:14 pm

Love it :handgestures-thumbup:
Eunos 1.6 special 1989 with a few added extras
Eunos 1991 1.6
Eunos 1990 1.6 project
Mk2 1999 1.8
User avatar
nedski
Serial Poster
Posts: 732
Joined: Fri Jun 01, 2012 11:17 pm
Location: North Kelsey, Market Rasen
Contact:

Re: Head work, Skim and simple porting.

Postby nedski » Tue Jan 21, 2014 10:57 pm

Jeese this is a steady job. only 4 done :doh:

Before and after.

Image

Image

Had a second head skimmed and it's ready for porting.
Also my Order from Autolink arrived .Cam belt kit and water pump, crank oil seal, Cas oil seal and some rear suspension adjuster bolts. Head set is coming from my local guys that skimmed the head.

Busy times.
Mk1 1.6 Turbo. Gaz shocks. Tr Lane roll bar.
Garage Owner, Lincolshire
Helper to the Scunny track day crew and North Linc's Track Day Club.
www.stokesofkelsey.co.uk
User avatar
binarypunk
Moderator
Posts: 1325
Joined: Thu Feb 21, 2013 1:34 pm
Location: NE Somerset
Contact:

Re: Head work, Skim and simple porting.

Postby binarypunk » Tue Jan 21, 2014 11:11 pm

Nice work so far... :-)

I do hope you find the blocks are straight after skimming the heads!
Jon - UK Mk1 1.6 1993 Classic Red

Check out my MX5 mods and tools:
http://www.binarypunk.co.uk
Need spares? Go to Autolink!
http://www.autolinkuk.co.uk/
User avatar
nedski
Serial Poster
Posts: 732
Joined: Fri Jun 01, 2012 11:17 pm
Location: North Kelsey, Market Rasen
Contact:

Re: Head work, Skim and simple porting.

Postby nedski » Wed Jan 22, 2014 10:18 am

They better be. :eek:

Do you know something I don't. Are they prone to warping?
I think I've only skimmed 1 iron block in 25 years. I'm 99% sure they will be fine, as headgaskets were perfect when the heads were removed. But I'll double check. :handgestures-thumbup:

If it was an alloy block with sleeves then yeh can be trouble, especially bloody Rovers!
Mk1 1.6 Turbo. Gaz shocks. Tr Lane roll bar.
Garage Owner, Lincolshire
Helper to the Scunny track day crew and North Linc's Track Day Club.
www.stokesofkelsey.co.uk
User avatar
binarypunk
Moderator
Posts: 1325
Joined: Thu Feb 21, 2013 1:34 pm
Location: NE Somerset
Contact:

Re: Head work, Skim and simple porting.

Postby binarypunk » Wed Jan 22, 2014 12:27 pm

No, no reason, just have personally given a head some TLC to find that it no longer fitted the block! That was out of a Stag though, so a whole other kettle of fish.
Jon - UK Mk1 1.6 1993 Classic Red

Check out my MX5 mods and tools:
http://www.binarypunk.co.uk
Need spares? Go to Autolink!
http://www.autolinkuk.co.uk/

Return to “MK1”

Who is online

Users browsing this forum: No registered users and 2 guests